Runaway Electrons

Taming Runaway Electrons from Fusion Plasma

Written by Tim Lash, Focus Fusion Society Contributor. Edited by Ignas Galvelis, Supervising Director. A team of European scientists has published findings revealing a better understanding of plasma dynamics allowing tokamak designs to take another step forward. In tokamak reactors, a catastrophic effect can occur known as runaway electrons. In these scenarios, free electrons in the plasma can form coherent currents of as much as one million amperes. These electron currents have the potential to breach the plasma containment fields and cause serious damage to the reactor. In a recent Letter to Physical Review, the team describe a method for countering such rogue currents thereby protecting the reactor from damage. Their method entails injecting neon (atomic number 10) or argon […]

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